Call and message blocking is free for Verizon customers (up to 5 numbers). If you’re on AT&T, you can add the feature through this link. Below we’ll explain how Verizon customers can block calls and messages:

Second, click here to go to the ‘Call & Message Blocking’ page. Once you’re there, select the account you want to manage. Notice that you can only block a number for 90 days. Additionally, you can only block 10 digit phone numbers, numbers like xxx-xxx-xxxx. You can block and unblock from this page. Just hit ‘Submit’ when your changes are made. See the screenshot below to see how it looks.